Question

If 5 times a number is increased by 4, the result is at least 19. Find the least possible number that satisfies these conditions.

Answer 1

3

Explanation:

5 times a number would be 5x, then increase that by 4 is 5x+4. The problem then says 5x + 4 ≥ 19. If we solve for x then we get x ≥ 3 so x has to be greater than or equal to 3, so the smallest number it could be is 3. You can even try any number smaller than 3 and see it doesn't work. even something like 2.9

Answer 2

x ≥ 3

Explanation:

Let the number = x

5 × the number = 5x

Increased by 4 means 5x +4

Is at least 19 means ≥ 19

5x + 4 ≥ 19

5x ≥ 15 Subtracted 4 from each side

x ≥ 3 Divided each side by 5

The smallest possible number that satisfies the conditions is x = 3.